CN101223885A - Micro electrolysis disinfecting preparation and preparing method thereof - Google Patents
Micro electrolysis disinfecting preparation and preparing method thereof Download PDFInfo
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Abstract
The invention discloses a micro-electrolysis disinfectant and a preparation method thereof. The disinfectant is mainly characterized in that effective chlorines contained in water are all hypochlorous molecules; the concentration of the effective chlorine is 10-200 ppm; the pH value is 4.5-7.0 and the oxidation-reduction potential is ORP 300-750mV. The preparation method comprises the steps that hydrochloric acid and pretreated tap water are mixed according to the ratio of 1:2500 to 10,000 to obtain the mixture; the mixture is then placed in a septum-free electrolytic bath with a negative electrode and a positive electrode for the electrolysis in an intermittent or continuous way under the voltage of 20-60V and the current of 0.2-20A. The disinfectant of the invention has the advantages of high efficiency, broad spectrum, stable sterilization capacity, safe and convenient application, environment protection, low corrosiveness and wide application scope. In addition, necessary facilities used in the preparation are simple with low cost and no wastewater discharge.
Description
Technical field
The invention belongs to disinfection sanitizer and preparation method thereof, relate in particular to a kind of micro electrolysis tech that utilizes and prepare disinfection sanitizer and preparation method thereof.
Background technology
At present, sterilizing method commonly used mainly contains two kinds of physical method and chemical methodes in the industrial and agricultural production.Physical sterilization mainly is to adopt the means of physics to kill or eliminate pathogenic microorganism, and as ultraviolet ray, microwave, heating power and radiation etc., but there is limitation such as versatility difference in generally nontoxic, harmless, of reduced contamination to environment.Chemical disinfection is to utilize chemicals that some specific pathogen microorganism is acted on, reach the purpose of killing pathogenic bacteria, disinfectant commonly used has caustic soda, clorox, milk of lime, formalin, Peracetic acid, hydrogen peroxide, potassium permanganate etc., uses chemosterilant to exist residual and problem of environmental pollution in a large number.Along with the enhancing of people's food security consciousness with environmental consciousness, press for efficient, easy, inexpensive, and the environmental protection disinfection sanitizer that animal and plant body is had no side effect.
In recent years, utilizing electrolysis tech to prepare acidic electrolytic water receives publicity as the method for disinfectant.Acidic electrolytic water is called acidic oxidized electric potential water, acid electrolyzed functional water, electrolysis functional water and electrolyzed-oxidizing water etc. again, be with electrolyte solutions such as salt under electric field action, generate through electrolysis.Acidic electrolytic water is different according to electrolysis mode and electrolysis degree, can be divided into strong acidic electrolyzed water (pH2.3～3.0), faintly acid brine electrolysis (pH3.0～4.5) and subacidity brine electrolysis (pH4.5～7.0).The overwhelming majority is as disinfectant with strong acidic electrolyzed water now, its generating principle and method are that certain density saline solution (water+sodium chloride) solution is joined in the electrolytic cell that the yin, yang electrode is installed, amberplex is separated into cathode chamber and anode chamber with electrolytic cell, under the impressed DC voltage effect, electrochemical reaction takes place in yin, yang the two poles of the earth, and water generation electrolysis produces hydrogen (H at negative electrode
2), hydroxyl ion (OH
-) the concentration rising, cathode chamber generates electrolyzed alkaline water; Anode produces chlorine (Cl
2), generate chlorine-containing compound (ClO
-And HClO) and hydrogen ion (H
+), the anode chamber generates acidic electrolytic water.Strong acidic electrolyzed water have low pH (2.3～2.7), high redox potential ORP (1000～1150mV) and low effective chlorine density (20～60ppm), have certain oxidability and bactericidal effect.
Existing electrolysis tech prepares the method for disinfectant, and mainly there are the following problems: (1) adopts double flute diaphragm type forceful electric power to separate mode, need amberplex, and amberplex is very expensive, stop up easily in the electrolytic process, cause diaphragm failures when serious, service life of equipment is low, and electrode pollutes easily, influence electrolytic efficiency, device fabrication cost and operating cost height cause production cost height; (2) acidic electrolytic water mainly is hypochlorous acid molecule (HClO) as the functional component of disinfectant sterilization.Under the identical effective chlorine density, the sterilizing ability of hypochlorous acid molecule is 80 times of hypochlorite ion.The strong acidic electrolyzed water disinfectant of prior art for preparing has low pH (2.3-2.7), available chlorine when low pH value mainly with chlorine Cl
2Form exists, and the chlorine instability generates hypochlorite ion ClO easily
-, reduced the sterilizing ability of acidic electrolysis aqueous disinfectant; (3) the strong acidic electrolyzed water disinfectant pH value that generates of the forceful electric power mode of separating is low, and corrosivity is big, easily metal (carbon steel, brass, aluminium alloy etc.) is caused corrosion, is used for plant cultivation easily plant corpus to be damaged and makes soil acidification to harden, and has limited application; (4) strong acidic electrolyzed water disinfectant character instability, reduction rate is fast, is unfavorable for storage; (5) there is chlorine to produce in the electrolytic process, unfavorable to environment and operating personnel; (6) existing double flute diaphragm type electrolysis mode produces the alkaline water with acidic electrolysis aqueous disinfectant equivalent amount in process of production, that is to say and produce 1 ton of disinfectant, will produce 1 ton of alkaline water, and the value of alkaline water is low, consumption is little, if not treated direct discharging is not only wasted precious water resource but also easily environment is polluted.
By retrieval, two patent applications close with the present invention are arranged, the one, (application number: 200410021043.4) disclose a kind of mixed liquor that adopts the direct electrolysis running water of no barrier film mode, sodium chloride and hydrochloric acid, generation has the highly acid electrolyzed oxidizing water of low pH value (＜2.7), high redox potential ORP (1050-1180mV) and low effective chlorine density (10-50ppm) as disinfectant to the patent of applications such as Geng Qingren " no ion diaphragm electrolysis tech prepares the acid oxidation potential water skill ".But there is following problem in this invention: the A. running water does not pass through preliminary treatment, and the character of running water has considerable influence to electrolytic process, thereby the quality of disinfectant is affected; B. used raw material is the salt mixed liquor, the strong acidic electrolyzed water of generation (pH＜2.7, ORP＞1050mV), reduction rate is fast, are unfavorable for storing, and strong to metal protection, limited application.
The 2nd, the patent application of Zhao Yupei etc. " a kind of brine electrolysis and salt produce the method for javelle water " (application number: 200410004734.3), this disclosure of the Invention a kind of be raw material (saline solution concentration is about 3%) with water and salt, electrolysis produces the method for javelle water under the 5V alternating voltage.Problems such as also there is electrolysis time long (120min) in this invention except the deficiency that has above-mentioned A and B, power consumption is big.
Summary of the invention
First purpose of the present invention provides a kind of micro electrolysis disinfecting that is applicable to field sterilizations such as livestock and poultry cultivation, plantation, food processing and accumulating, medical treatment, food and drink.
Second purpose of the present invention provides the preparation method of above-mentioned disinfection sanitizer.
For achieving the above object, technical scheme of the present invention is:
A kind of micro electrolysis disinfecting, its acid-base value are pH4.5～7.0, and redox potential is ORP300～750mV, contain hypochlorous acid molecule HClO in water, and the concentration of hypochlorous acid molecule is 10～200ppm (in effective chlorine density).
Above-mentioned micro electrolysis disinfecting, be prepared as follows: mix according to 1: 2500～10000 ratio with hydrochloric acid with through pretreated running water, obtain mixed liquor, then mixed liquor batch (-type) or continous way are inserted in the undivided cell that has the yin, yang electrode, at voltage is that 20～60V, electric current are instant electrolysis under 0.2～20A condition, promptly gets disinfection sanitizer of the present invention.
The preparation method of above-mentioned micro electrolysis disinfecting, carry out according to following steps: mix according to 1: 2500～10000 ratio with hydrochloric acid with through pretreated running water, obtain mixed liquor, then mixed liquor batch (-type) or continous way are inserted in the undivided cell that has the yin, yang electrode, at voltage is that 20～60V, electric current are instant electrolysis under 0.2～20A condition, promptly gets disinfection sanitizer of the present invention.
Available chlorine in the above-mentioned disinfection sanitizer all is the hypochlorous acid molecule.
Described preliminary treatment is meant removes calcium too much in the running water, magnesium ion, handles as spent ion exchange resin.
The molar concentration of the mixed liquor described in above-mentioned disinfection sanitizer or its preparation method is 1-4.8mM.
The undivided cell that has the yin, yang electrode described in above-mentioned micro electrolysis disinfecting or its preparation method can be bought from the market, and the fragrant bohr of east space Science and Technology Ltd. produces undivided cell as Shenyang.
Advantage that the present invention had and beneficial effect: (1) can reduce device fabrication cost and production run cost greatly, enhances productivity.The present invention is a raw material with wide material sources, cheap running water and micro-hydrochloric acid, adopts the little electrolysis mode of no barrier film, owing to do not have barrier film, easy and simple to handle, the production efficiency height, device fabrication and production run cost are low, and product price is low.(2) non-wastewater discharge.The present invention adopts single groove not have the little electrolysis mode of barrier film, and material liquid all is converted into disinfectant in the production process, does not produce any waste water, therefore, can save great lot of water resources.(3) efficiently, wide spectrum, sterilizing ability are stablized.The main functional component of the sterilization of brine electrolysis disinfectant is hypochlorous acid molecule (HClO), compare with the strong acidic electrolyzed water disinfectant, micro electrolysis disinfecting higher pH of the present invention (pH4.5-7.0), available chlorine almost completely exists with the hypochlorous acid molecule (HClO) with extremely strong bactericidal effect, so its sterilizing ability is about 80 times of hypochlorite, sterilizing ability is strong, and effective chlorine density changes hardly in the storage process, stable sterilization effect.(4) little, the applied range of corrosivity.The micro electrolysis disinfecting that the present invention generates has the acid-base value (pH4.5-7.0) of neutral meta-acid, corrosivity is little, applied widely, be applied to fields such as livestock and poultry cultivation, plantation, industrialized agriculture, food processing and accumulating, medical treatment, food and drink sterilization except can be used as disinfectant, both can be used for cleaning and sterilizing and assanation control that agricultural production raw material and animal body also can be used for production equipment, and can also substitute the part chemical pesticide and be applied to plant cultivation.(5) safe in utilization, convenient, green, environmental protection.Thoroughly be reduced into light water after the disinfectant sterilization, and almost do not have the chlorine discharging in the production process, environment and operating personnel are not had harm, belong to safety, green, environmental protection disinfectant.(6) mode of production and production capacity are flexible.Can adopt the batch (-type) or the continous way mode of production as required; Production capacity can be designed to industrial main equipment or domestic small equipment as required.
Embodiment
Embodiment 1
The preparation of micro electrolysis disinfecting
With concentration is that the hydrochloric acid 0.2ml of 36-38% joins 1L through evenly mixing (molar concentration is 2.4mM) in the pretreated running water, mixed liquor; After testing, the electrical conductivity of mixed liquor is 75mS/cm, pH5.75, and ORP 535.7mV, then mixed liquor being joined volume is 33 * 15 * 3.5cm
3Have in the undivided cell (the Shenyang fragrant bohr of east space Science and Technology Ltd. produces) of yin, yang electrode, (29.2 * 14cm) materials are titanium platinum plating iridium ruthenium to battery lead plate, the two-plate spacing is 0.4cm, electrolysis 10min under 40V voltage 20A current condition, obtain pH 6.07, ORP 333.3mV, effective chlorine density are the micro electrolysis disinfecting of 15ppm.What this embodiment adopted is the batch (-type) electrolysis mode.
Embodiment 2
The preparation of micro electrolysis disinfecting
Be mixed into the hydrochloric acid solution that molar concentration is 3mM (the pretreated running water of hydrochloric acid+process with hydrochloric acid with through pretreated running water, electrical conductivity is 82mS/cm, and to add volume continuously with the flow velocity of 10-15L/min be 35 * 20 * 2.5cm pH4.52, ORP 447.9mV),
3Have in the undivided cell (the Shenyang fragrant bohr of east space Science and Technology Ltd. produces) of yin, yang electrode, (30 * 16cm) materials are the platinized titanium antimony alloy to battery lead plate, the two-plate spacing is 0.4cm, electrolysis under 40V voltage, obtain pH5.81, ORP 690.0mV, effective chlorine density are the micro electrolysis disinfecting of 38ppm.
Embodiment 3
Micro electrolysis disinfecting is to salmonella and the colibacillary bactericidal assay of causing a disease
The disinfection sanitizer that utilizes embodiment 1 to make carries out bactericidal assay to main pathogenic bacteria salmonella (white diarrhea salmonella Salmonella Pullorum and Bacterium enteritidis Salmonella enteritidi) and Escherichia coli (Escherichia coli).Bacterial classification and medium are available from Beijing Haidian Zhonghai Animal Health Technology Co., Ltd..Comprise the steps
(1) preparation of bacteria suspension
With cryodesiccated actication of culture, be inoculated on the trypticase soy agar medium, 37 ℃ of constant temperature culture 24 hours are inoculated into then and put into refrigerator on the test tube slant and preserve standby.
With the bacterial classification after the activation respectively from each strain inclined plane a small amount of lawn of picking be inoculated on the trypticase soy agar flat board with plate streak, 37 ℃ of constant temperature culture 24h are as original strain, to the test tube of 10m l sterile saline, after miniature spiral mixed instrument fully mixes, make original bacteria liquid with an amount of original strain of oese picking after the calcination sterilization, with sterile saline each original bacteria liquid is mixed with then and contains bacterium number about 10
7-10
8The bacteria suspension of cfu/ml is standby.
(2) bactericidal assay
Bacteria suspension 1ml is joined respectively in the test tube that the above-mentioned disinfectant of 4ml is housed, after 0min, 1min, 2min, 3min, 5min mixing sterilization, get 1ml respectively and add the aseptic neutralizer of 9ml (0.05% Na
2S
2O
3Join in the phosphate buffer of 0.03M, pH 7.2,121 ℃, 0.1MPa sterilization 15min down make, the effect of neutralizer is to stop sterilization) in, mix the back and carry out gradient dilution in 10 times ratio, the 1ml mixed liquor is joined in the 9ml physiological saline, be inoculated into behind the mixing on the trypticase soy agar flat board, count behind 37 ℃ of constant temperature culture 24h.Each dilution factor is done three repetitions.Contrast is the non-processor group, is about to the 1ml bacteria suspension and joins mixing in the 9ml stroke-physiological saline solution, after mixing through 0min, 1min, 2min, 3min, 5min, adopts the gradient dilution method to be inoculated on the trypticase soy agar flat board, counts behind 37 ℃ of constant temperature culture 24h.Water temperature is 26 ± 1 ℃ during experiment.Experiment repeats 3 times at least, and the result is a mean value.
The result shows (seeing Table 1), and the micro electrolysis disinfecting of the present invention's preparation all has killing effect fast and efficiently to salmonella and Escherichia coli.
Table 1 disinfection sanitizer of the present invention is to salmonella and colibacillary bactericidal assay result
| Sterilizing time | 0min | 1min | 2min | 3min | 5min |
| Salmonella | 7.2×10 7 | Do not detect | Do not detect | Do not detect | Do not detect |
| Escherichia coli | 6.5×10 8 | Do not detect | Do not detect | Do not detect | Do not detect |
| Contrast | 7.1×10 7 | 6.8×10 7 | 6.9×10 7 | 6.9×10 7 | 6.9×10 7 |
Embodiment 4
Micro electrolysis disinfecting is to infecting the bactericidal assay of salmonella and colibacillary chicken wings
The disinfection sanitizer that embodiment 2 is made carries out bactericidal assay to infecting salmonella and colibacillary chicken wings, and observes its influence to the chicken wings exterior quality.Bacterial classification and medium are available from Beijing Haidian Zhonghai Animal Health Technology Co., Ltd., and chicken wings (in the wing) is available from the supermarket.Comprise the steps:
(1) preparation of bacteria suspension is with embodiment 3.
(2) chicken wings bactericidal assay
Chicken wings (50g/) is cleaned repeatedly with running water, with 84 thimerosal cleaning and dipping 10min of dilution, take out the chicken wings that soaked and wash repeatedly then, and put the sterile working platform and dry with distilled water.Contain the bacterium number with the beaker preparation and be about 10
7The salmonella of cfu/ml and Escherichia coli Mixed Microbes suspension, the chicken wings of handling is put into bacteria suspension soak 1h, with the miniature spiral mixed instrument beaker that vibrates gently, purpose makes bacterium fully be built-up on the chicken wings, the chicken wings that has infected germ is taken out from beaker, put into the sterile working platform and dry 1h.
The chicken wings that has infected germ is placed on (little electrolytic sterilizing thimerosal that the about 150ml of dress prepares in the beaker) in the beaker of 250ml, handle 0.5min respectively, 1min and 2min, sterilization is taken out chicken wings after finishing immediately, the beaker (the about 150ml aseptic deionized water of dress in the beaker) of putting into 250ml soaks, beaker is placed on vibration gently on the miniature spiral mixed instrument, take out chicken wings, carry out the 24h cultivation to soaking water then, simultaneously the brine electrolysis bactericidal liquid after the immersion chicken wings is also carried out enrichment culture, last microorganism count.Microorganism count adopts the gradient dilution method, is about to liquid to be measured and is inoculated on the trypticase soy agar flat board, counts behind 37 ℃ of constant temperature culture 24h.Contrast is aseptic deionized water.Water temperature is 26 ± 1 ℃ during experiment.Experiment repeats 3 times at least, and the result is a mean value.
Result's (seeing Table 2) shows that effective chlorine density is that the thimerosal 30s of 15ppm can kill salmonella and the Escherichia coli that infect on the chicken wings fully; Bactericidal liquid after the immersion chicken wings is carried out enrichment culture, do not detect bacterium colony, therefore do not have germ in the treatment fluid after the effect, discharging can not cause secondary pollution to environment.The micro electrolysis disinfecting of the present invention's preparation can be used for the sterilizing of chicken wings, and the chicken wings exterior quality is not had obvious harmful effect.
Table 2 disinfection sanitizer of the present invention is to the bactericidal assay result of chicken wings
| Remaining bacterium quantity (cfu/ml) | |||
| Sterilizing time | 0.5min | 1min | 2min |
| Control group | 4.8×10 7 | 4.5×10 7 | 4.3×10 7 |
| Processed group (effective chlorine density 15ppm) | Do not detect | Do not detect | Do not detect |
Different electrolysis disinfecting stability contrast experiments
(with 0.1%NaCl solution is electrolyte for micro electrolysis disinfecting that embodiment 2 is made and the preparation of homemade brine electrolysis generator, double flute has the barrier film forceful electric power to separate mode) pH2.7, ORP1152.6, effective chlorine density is 27ppm and pH3.2, ORP1038.3, effective chlorine density is that the strong acidic electrolyzed water of 52ppm is respectively charged in the plastic bottle, and 25 ℃ of airtight preservations 30 days are determined at the variation of effective chlorine density in the preservation process.
Bactericidal assay
Disinfectant before and after storing is carried out bactericidal assay to salmonella and Escherichia coli respectively.Bacteria suspension preparation and bactericidal assay method are with embodiment 3.
(see figure 1) as can be seen as a result, in storage process, by force, the effective chlorine density of faintly acid brine electrolysis disinfectant (pH2.7 and pH3.2) obviously reduces, and the effective chlorine density of micro electrolysis disinfecting of the present invention (pH5.8) changes in storage process hardly;
Bactericidal effect (seeing Table 3): along with the prolongation of period of storage, strong, faintly acid brine electrolysis sanitizer disinfecting effect weakens disinfection sanitizer stable sterilization effect of the present invention.
Three kinds of brine electrolysis of table 3 are being stored front and back to salmonella and colibacillary bactericidal assay result
| Bacterial classification | Store | Remaining bacterium quantity (cf/mL) | ||
| Strong acidic electrolyzed water (pH2.7) | Faintly acid brine electrolysis (pH3.2) | Subacidity brine electrolysis (pH5.8) | ||
| Salmonella | Before | Do not detect | Do not detect | Do not detect |
| After | 1.1×10 2 | 2.2×10 3 | Do not detect | |
| Escherichia coli | Before | Do not detect | Do not detect | Do not detect |
| After | 1.7×10 2 | 3.8×10 3 | Do not detect | |
Embodiment 6
Different electrolysis disinfecting metal protection comparative trials
Adopt weight method to test.Under 20 ℃ of conditions of temperature, carbon steel coupon, stainless steel substrates, copper sheet and aluminium flake are fully cleaned the back dry weigh (being accurate to 0.1mg), putting into three kinds of disinfection sanitizers described in the experimental example 5 respectively soaks, every 2h changes once sterilizing liquid, takes out sheet metal behind the 72h, cleaning down, dry, accurately weigh, calculate corrosion rate (every group of 3 parallel samples are averaged), determine corrosivity.Control group soaks stainless steel substrates with deionized water.Corrosion rate R calculates as follows, and disinfectant is divided into level Four to rate of metal corrosion: R≤0.01 does not have corrosion substantially; 0.01～0.1 mild corrosion; 0.1～1.0 moderates corrosion; The corrosion of＞1.0 severes is to estimate the corrosivity of disinfectant to different metal material.
In the formula:
R: corrosion rate (mg/h)
M: sheet metal weight (g) before handling
M
t: handle back sheet metal weight (g)
S: test card area (cm
2)
T: test period (h)
D: density of material (kg/m
3)
Result's (seeing Table 4) shows that the micro-electrolytic water disinfectant of the present invention's preparation has slight corrosion to carbon steel and stainless steel non-corrosiveness to copper and aluminium; And the strong acidic electrolyzed water that the forceful electric power mode of separating makes all has heavy corrosion to carbon steel, copper, aluminium, and the faintly acid brine electrolysis has the severe corrosion to aluminium, and copper and aluminium are had the moderate corrosion.Illustrate that micro electrolysis disinfecting of the present invention is little to metal protection, but extensive use.
Three kinds of brine electrolysis disinfectants of table 4 are to the corrosion of metal comparative test result
| Disinfectant | Metal | Corrosion rate (mg/h) | Corrosion class |
| Micro-electrolytic water (pH5.8) | Copper | 0.053 | Mild corrosion |
| Aluminium | 0.085 | Mild corrosion | |
| Carbon steel | 0.007 | There is not corrosion | |
| Stainless steel | 0.001 | There is not corrosion | |
| Strong acidic electrolyzed water (pH2.7) | Copper | 1.165 | The severe corrosion |
| Aluminium | 1.218 | The severe corrosion | |
| Carbon steel | 1.351 | The severe corrosion | |
| Stainless steel | 0.008 | There is not corrosion | |
| Faintly acid brine electrolysis (pH3.2) | Copper | 0.632 | The moderate corrosion |
| Aluminium | 1.189 | The severe corrosion | |
| Carbon steel | 0.851 | The moderate corrosion | |
| Stainless steel | 0.005 | There is not corrosion |
Claims (9)
1. a micro electrolysis disinfecting is characterized in that its acid-base value is pH4.5～7.0, and redox potential is ORP 300～750mV, contains hypochlorous acid molecule HClO in water, and the concentration of hypochlorous acid molecule is 10～200ppm.
2. according to the described disinfection sanitizer of claim 1, be prepared as follows: mix according to 1: 2500～10000 ratio with hydrochloric acid with through pretreated running water, get mixed liquor; Then mixed liquor batch (-type) or continous way being inserted in the undivided cell that has the yin, yang electrode, is that 20～60V, electric current are instant electrolysis under 0.2～20A condition at voltage, promptly gets disinfection sanitizer of the present invention.
3. according to the described disinfection sanitizer of claim 2, it is characterized in that described preliminary treatment is meant running water through TREATMENT OF ION EXCHANGE RESINS.
4. according to claim 2 or 3 described disinfection sanitizers, it is characterized in that described batch (-type) is meant mixed liquor is inserted in the undivided cell that has the yin, yang electrode off and on.
5. according to claim 2 or 3 described disinfection sanitizers, it is characterized in that described continous way is meant mixed liquor is inserted in the undivided cell that has the yin, yang electrode continuously.
6. the preparation method of claim 1,2 or 3 described disinfection sanitizers is characterized in that carrying out according to following steps: mix according to 1: 2500～10000 ratio with hydrochloric acid with through pretreated running water, get mixed liquor; Then mixed liquor batch (-type) or continous way being inserted in the undivided cell that has the yin, yang electrode, is that 20～60V, electric current are instant electrolysis under 0.2～20A condition at voltage, promptly gets disinfection sanitizer of the present invention.
7. according to the described preparation method of claim 6, it is characterized in that described preliminary treatment is meant running water through ion exchange resin treatment.
8. according to claim 6 or 7 described preparation methods, it is characterized in that described batch (-type) is meant mixed liquor is inserted in the undivided cell that has the yin, yang electrode off and on.
9. according to claim 6 or 7 described preparation methods, it is characterized in that described continous way is meant mixed liquor is inserted in the undivided cell that has the yin, yang electrode continuously.
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